IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2012  > Vol9 No.5
Characterizing Spatial Patterns of Precipitation Based on Corrected TRMM 3B43 Data over the Mid Tianshan Mountains of China
JI Xuan; CHEN Yunfang
Corresponding AuthorJI Xuan
2012-10
Source PublicationJournal of Mountain Science
Volume9Issue:5Pages:628-645
AbstractThe poor distribution of meteorological stations results in a limited understanding of the precipitation pattern in the Tianshan Mountains. The spatial patterns of precipitation over the mid Tianshan Mountains were characterized based on the TRMM 3B43 monthly precipitation data. By comparing satellite estimates with observed data, it shows that TRMM 3B43 data underestimate the precipitation in mountain region. Regression models were developed to improve the TRMM 3B43 data, using geographic location and topographic variables extracted from DEM using GIS technology. The explained variance in observed precipitation was improved from 64% (from TRMM 3B43 products alone) to over 82% and the bias reduced by over 30% when location and topographic variables were added. We recalculated all the TRMM 3B43 monthly precipitation grids for the period 1998 to 2009 using the best regression models, and then studied the variation patterns of precipitation over the mid Tianshan Mountains. The results are well explained by a general understanding of the patterns of precipitation and orographic effects. This indicated that the Tianshan Mountains strongly influences the amount and distribution of precipitation in the region. This is highlighted by the confinement of the precipitation maxima to the windward (northern slope). And complex vertical changes in the provenance and distribution of precipitation, like that a negative increasing rate of precipitation in the vertical direction exists in the north but does not in south. The results have also revealed large gradients and different patterns in seasonal precipitation that are not simply related to elevation, the distribution of precipitation may also be affected by other seasonal factors such as the sources of moist air, wind direction and temperature.
KeywordSpatial Pattern Precipitation Tianshan Mountains Trmm
DOI10.1007/s11629-012-2283-z
Indexed BySCI
Language英语
Citation statistics
Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5134
CollectionJournal of Mountain Science_Journal of Mountain Science-2012_Vol9 No.5
Corresponding AuthorJI Xuan
Recommended Citation
GB/T 7714
JI Xuan,CHEN Yunfang. Characterizing Spatial Patterns of Precipitation Based on Corrected TRMM 3B43 Data over the Mid Tianshan Mountains of China[J]. Journal of Mountain Science,2012,9(5):628-645.
APA JI Xuan,&CHEN Yunfang.(2012).Characterizing Spatial Patterns of Precipitation Based on Corrected TRMM 3B43 Data over the Mid Tianshan Mountains of China.Journal of Mountain Science,9(5),628-645.
MLA JI Xuan,et al."Characterizing Spatial Patterns of Precipitation Based on Corrected TRMM 3B43 Data over the Mid Tianshan Mountains of China".Journal of Mountain Science 9.5(2012):628-645.
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